Improvement in gas-pressure governors



' M. LBES. Gas-Pressure Governor.

No. 222,289. Patented Dec. 2,1879.

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N. PErERs. PHOTD-LITHUGRAFHER. WASHNGTON. D C

UNITE STATES PATENT'OF ICE.

MILES LEES, OF PROVIDENCE, RHODE ISLAND.

IMPBOVEMENT IN GAS-PRESSURE GOVERNO RS.

Specification forming part of Letters Patent No. 222.289, dated December 2, 1879; application filed April 25, 1879. i

To all whom it may concw: Be it known that I, MILEs LEEs, of the city and County of Providence, and State of Rhode the external pressure.

This invention has reference to the class of gas pressure governors in which the pressure of the gas is regulated by a valve operated by a cup-shaped diaphragn, the edge of which is innersed in 1nercury,-so as to form a gasseal; and it` consists in the peculiar Construction of the various parts, as will be more fully set forth hereinafter.

In the drawing, a is the gas-inlet; b, the reg-' ulating-valve; c, the cup-shaped diaphragm, the lower edge ot' which is immersed in mercury held in the annular space forned between the outer case and the done d. This done extends upward, surrounding the Valve-stem, and the aperture in the apex ot' the dome is surrounded by the guard e. The object of this dome and the guard is to prevent the possibility of the mercury from any cause entel-in g the Valve, the pipes, or the gas-meter. The diaphragn c is secured to the valVe-stem f,

i which, extending Upward, is surrounded by a coilcd spring, g, restin g on a nut or its equivalent, and this spring is adj usted by the thunb screw h, so that the pressure on the diaphragn can be regulated, and thus the maximum press ure of the gas, for as soon as the gas-pressure is increased the diaphragm c, and with it the Valve b, will be raised and the supply diminished until the pressure falls, when the diaphragn also falls, and the valve is opened.

It happens at times that a sudden pressure .of gas will close the valve, and thus shut ofi the gas-supply, by which lights are liable to be extinguished, and when the valve is again opened the gas will enter the building unconsumed. To prevent the entire closing of the gas-supply the relief-valve i is provided, held by a light spring.

The dome d may form part of anannular cup, and may be inserted into the gvernor. It may be nade of glass, or it may be made of any other material protected by an enamel which is not affected by the mercury or the gas.

The mercury may be protected from contact with the gas, so as to prevent oxidation, by glycerine or other non-oxidizable matter; or a bag made of bladder, oiled silk, or other pliable material may be Secured to 'the val-vestem or the diaphragm, and to or within the curve of the gnard 6, so that while the diaphragm c is filled with gas the gas cannot reach. the mercury.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a gas-regulator or pressure-governor, the combination, with an annular Inercurychannel, of the dome d, provided with the guard e, and having a contracted central opening or aperture, substantially as set -forth.

2. In a gas-pressure governor, the combination, with the valve b and done d, provided with a guard, e, of the cup-shaped diaphragm c, Valvestem f, spring g, and adjustable nut h, substantially as set fo-th. y v

MILES LEES. Witnesses: J osEPH A. MILLER,

J. A. MILLER., Jr. 

